The dollar rose against most major peers as investors speculate whether the Federal Reserve is moving closer to raising interest rates with the U.S. economy strengthening while inflation persists below the central bank’s target.

The Dow Jones Industrial Average capped the worst week since 2011, finishing with a 100-point lurch in the final half-hour of trading, as equities tumbled around the world after crude extended declines below $58 a barrel.

The collapse in the price of oil is unmaking deflationary pressures and could cause a wave of defaults as the global economy and cause an environment where people are going to be less willing to lend money not just in the energy sector but across the economic spectrum. Not only are there growing supply side worries it is coupled with signs of weakening demand.